Parasites of the Larch Casebearer in Montana, Idaho, and Washington

Twenty parasitic and hyperparasitic species were reared from Coleophora laricella</it> (Hübner) from 95 locations in Montana, Idaho, and Washington. Spilochalcis albifrons (Walsh) and Dicladocerus</it> sp. near westwoodii</it> Westwood were the most abundant native species recovered. Agathis pumila</it> (Ratzeburg), an introduced parasite, was recovered from 58% of the release sites sampled in 1970.